. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 68 bulletin: museum of comparative zoology. Sandy beds with boulders succeed to the shales for a few feet of thickness. Shales come in again above this level, rarely with striated pebbles. sw. Fig. 17.— Section of Permian shales, boukler-beds. and sandstones at Rio Nea:ro. The section, at the bridge (Fig. 17) above referred to, displays sandstones at water-level somewhat cross-bedded and carrying scattered pebbles and small blocks. I measured one granitic frag- ment 16 inches long. On the south side of the Rio Ne
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 68 bulletin: museum of comparative zoology. Sandy beds with boulders succeed to the shales for a few feet of thickness. Shales come in again above this level, rarely with striated pebbles. sw. Fig. 17.— Section of Permian shales, boukler-beds. and sandstones at Rio Nea:ro. The section, at the bridge (Fig. 17) above referred to, displays sandstones at water-level somewhat cross-bedded and carrying scattered pebbles and small blocks. I measured one granitic frag- ment 16 inches long. On the south side of the Rio Negro along the road going eastward towards Sao Bento yellow^ tillite beds with intercalated dark shales contain many granitic boulders. A cobble eight inches in diameter showed good striation. The boulders range from two to three feet. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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Keywords: ., bookauthorha, bookcentury1900, bookdecade1910, booksubjectzoology
